作　　者： ; ;

机构地区： 华南农业大学

出　　处： 《华南农业大学学报》 1994年第4期7-12,共6页

摘　　要： 本研究测定了不同堆沤时限蔗渣（新鲜和堆沤３，６，９及１２个月蔗渣）的理化性质，详细探讨蔗渣堆沤后的变化特征；并用分离的各蔗渣组分和多种纯无氮有机物来调节沙培系统的Ｃ／Ｎ比值，进行微生物夺取速效氮强度的模拟试验，查明了蔗渣中各组分和多种纯无氮有机物对微生物的有效性，确定蔗糖、淀粉、半纤维素和纤维素是微生物有效（速效）的碳源，而本质素是无效（迟效）的碳源。从而提出以“有效Ｃ／Ｎ比值”代替以往人们常用的“总Ｃ／Ｎ比值”来对有机肥料分解状况进行准确的判断。 This study was conducted to determine the physicaland chemical characteristics ofbagasse composted for 0,3,6,9 and 12 months, respertively and, by carrying out simu-lated experiments using several pure N-free carbonaceous compounds and all theseparate components of bagasse in sand culture system,to determine the availabilityof carbonaceous compounds and N immobilization by microorganisms. The resultsshowed that sucrose,starch, hemicellulose and cellulose were rapidily available Csources and lignin was a slowly available C source for microorganisms.The studyalso proposed that it was more precise and rational to use the“effective C/N ratio”(thetotal carbon content substracted by the carbon content of lignin divided by total Ncontent of bagasse) than to use the“total C/N ratio”to predict the decomposition oforganic materials and the intensity of nitrogen immobilization by microorganisms.

关 键 词： 蔗渣 蔗渣组分 土壤 碳 氮 堆肥

领　　域： [农业科学] [农业科学]